Performance of transmit antenna selection in non-orthogonal multiple access for 5G systems

Transmit antenna selection is very common technique to reduce system complexity and power consumption at transmitter side while maintaining nearly the same performance of multiple antennas. In this paper, we introduce a transmit antenna selection (TAS) scheme for non orthogonal multiple access (NOMA) to improve the performance in terms of total sum rate. Therefore different antenna elements added at the base station experiences different fading conditions (A channel is a time varying channel).Experiences different SNR values adding more number of antennas at the base station. Increases the complaxicity as well as the performance with respect to the sum rate Non linear the user experiences the Bit error rate at the receiver simulation results shows that the BER is verified for different antenna error consideration (MIMO).

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Transmit Antenna Selection Schemes for NOMA with Randomly Moving Interferers in Interference-Limited Environment

Electronics ◽

10.3390/electronics9010036 ◽

2019 ◽

Vol 9 (1) ◽

pp. 36

Author(s):

Dinh-Thuan Do ◽

Thanh-Luan Nguyen ◽

Byung Moo Lee

Keyword(s):

Stochastic Geometry ◽

Multiple Access ◽

Poisson Point Process ◽

Antenna Selection ◽

Ergodic Capacity ◽

Base Station ◽

Selection Strategy ◽

Practical Consideration ◽

Transmit Antenna Selection ◽

Spatial Topology

In this paper, non-orthogonal multiple access (NOMA) is studied at downlink under impact of surrounding interference. This study benefits the practical NOMA system since spatially random interference is adopted. More specifically, we consider the antenna selection strategy applied at the base station and compare the performance of two users. By applying a stochastic geometry-based model, homogeneous Poisson point process (PPP) is employed to consider the spatial topology of interference which is located near to users, and such a model is extremely suitable for practical consideration. We first consider outage probability and then ergodic capacity is examined as main metrics to recommend such model in practice. According to the considered antenna section scheme of the base station, we compare these schemes related to selected antenna serving each user. To confirm exactness of derived expressions, we perform Monte Carlo simulations to verify the analytical results.

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Exploiting Joint Base Station Equipped Multiple Antenna and Full-Duplex D2D Users in Power Domain Division Based Multiple Access Networks

Sensors ◽

10.3390/s19112475 ◽

2019 ◽

Vol 19 (11) ◽

pp. 2475 ◽

Cited By ~ 8

Author(s):

Dinh-Thuan Do ◽

Minh-Sang Van Nguyen ◽

Thi-Anh Hoang ◽

Byung Moo Lee

Keyword(s):

Multiple Access ◽

Antenna Selection ◽

Base Station ◽

Base Stations ◽

Full Duplex ◽

Mobile Users ◽

Multiple Antenna ◽

Transmit Antenna Selection ◽

Single Output ◽

Power Domain

In this paper, we investigate power domain division-based multiple access (PDMA) to support the base stations (BS) equipped with multiple antennas to serve mobile users. Such a system deploys multiple input single output (MISO)-based wireless transmission and a full-duplex (FD) scheme. Furthermore, such MISO PDMA system consists of BS employing transmit antenna selection to reduce complexity in signal processing at the receivers. We distinguish two kinds of mobile users, device-to-device (D2D) users and traditional users. In such MISO PDMA, there exists a trade-off between outage performance of each PDMA user and power allocation factors. Since the implementation of the FD scheme at PDMA users, bandwidth efficiency will be enhanced despite the existence of self-interference related to such FD. In particular, exact expressions of outage probability are derived to exhibit system performance with respect to D2D users. Finally, valuable results from the simulated parameters together with the analytical results show that MISO PDMA can improve its performance by increasing the number of transmit antennas at the BS.

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